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  1. Article: Is Endothelial Activation a Critical Event in Thrombotic Thrombocytopenic Purpura?

    Cauchois, Raphael / Muller, Romain / Lagarde, Marie / Dignat-George, Françoise / Tellier, Edwige / Kaplanski, Gilles

    Journal of clinical medicine

    2023  Volume 12, Issue 3

    Abstract: Thrombotic thrombocytopenic purpura (TTP) is a severe thrombotic microangiopathy. The current pathophysiologic paradigm suggests that the ADAMTS13 deficiency leads to Ultra Large-Von Willebrand Factor multimers accumulation with generation of ... ...

    Abstract Thrombotic thrombocytopenic purpura (TTP) is a severe thrombotic microangiopathy. The current pathophysiologic paradigm suggests that the ADAMTS13 deficiency leads to Ultra Large-Von Willebrand Factor multimers accumulation with generation of disseminated microthrombi. Nevertheless, the role of endothelial cells in this pathology remains an issue. In this review, we discuss the various clinical, in vitro and in vivo experimental data that support the important role of the endothelium in this pathology, suggesting that ADAMTS13 deficiency may be a necessary but not sufficient condition to induce TTP. The "second hit" model suggests that in TTP, in addition to ADAMTS13 deficiency, endogenous or exogenous factors induce endothelial activation affecting mainly microvascular cells. This leads to Weibel-Palade bodies degranulation, resulting in UL-VWF accumulation in microcirculation. This endothelial activation seems to be worsened by various amplification loops, such as the complement system, nucleosomes and free heme.
    Language English
    Publishing date 2023-01-18
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12030758
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Factors associated with the decision of a French hospital to report child abuse to judicial rather than administrative authorities.

    Bailhache, Marion / Lerole, Adeline / Lagarde, Marie / Richer, Olivier

    Archives de pediatrie : organe officiel de la Societe francaise de pediatrie

    2021  Volume 28, Issue 5, Page(s) 360–365

    Abstract: Objectives: Two independent sectors manage the child protection system in France: judicial and administrative protection. The choice between judicial or administrative reporting depends on the seriousness of the case. The goal of this study was to ... ...

    Abstract Objectives: Two independent sectors manage the child protection system in France: judicial and administrative protection. The choice between judicial or administrative reporting depends on the seriousness of the case. The goal of this study was to determine the characteristics associated with the decision in a French pediatric hospital to report child abuse to judicial instead of administrative authorities.
    Methods: A retrospective study was conducted. Participants were all the children (n=83) who were admitted from 2017 to 2018 to the emergency department (ED) and the general ward of a pediatric university hospital in France, and were reported for suspicion of child abuse by the professional teams. The children who were suspected victims of sexual abuse were excluded. Multivariate logistic regressions were used.
    Results: A total of 47 children were reported to judicial authorities, and 36 to administrative authorities. Their median age was 7 years. Suspicion of physical abuse (odds ratio [OR]: 21.2; 95% confidence interval [CI]: 4.5-99.1), cases reported by the pediatric ward team (OR: 9.1; 95% CI: 1.9-43.6), adult person different from parents who accompanied the child to the ED (OR: 5.8; 95% CI: 1.2-28.6), and perception of parental behavior as inappropriate and non-cooperative (OR: 6.6; 95% CI: 1.4-29.6) were associated with a higher risk of the case being reported to judicial authorities. Data were often unavailable for parental health issues, history of child abuse, and intimate partner violence.
    Conclusion: Some factors associated with the choice of report type were most likely quite subjective. Better documentation and standardization are needed.
    MeSH term(s) Adolescent ; Child ; Child Abuse ; Child Protective Services/methods ; Child, Preschool ; Cross-Sectional Studies ; Decision Making ; Female ; France ; Hospitals/standards ; Hospitals/statistics & numerical data ; Humans ; Judicial Role ; Male ; Odds Ratio ; Qualitative Research ; Retrospective Studies ; Risk Factors
    Language English
    Publishing date 2021-05-14
    Publishing country France
    Document type Journal Article
    ZDB-ID 1181947-9
    ISSN 1769-664X ; 0929-693X
    ISSN (online) 1769-664X
    ISSN 0929-693X
    DOI 10.1016/j.arcped.2021.04.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Do Victims of Abusive Head Trauma Visit Emergency Departments More Often Than Children Hospitalized for Fever? A Case-Control Study.

    Bailhache, Marion / Lafagne, Ambre / Lagarde, Marie / Richer, Olivier

    Pediatric emergency care

    2021  Volume 38, Issue 1, Page(s) e310–e315

    Abstract: Objective: During the first years of life, infant crying is a common trigger of abusive head trauma (AHT). Emergency department (ED) use by AHT victims before visits for child abuse symptoms is not well known, particularly for infant crying. Furthermore, ...

    Abstract Objective: During the first years of life, infant crying is a common trigger of abusive head trauma (AHT). Emergency department (ED) use by AHT victims before visits for child abuse symptoms is not well known, particularly for infant crying. Furthermore, diagnosis could be missed. In the same period, fever is a common reason for hospitalization unconnected with AHT. The main goal of our study was to compare the ED use by AHT victims before visits for child abuse symptoms and by children of the same age hospitalized for fever.
    Methods: We conducted a retrospective case-control study from 2011 to June 2018 in a French hospital. We compared cases of AHT selected using the International Classification of Diseases and control subjects hospitalized in the general pediatric unit for fever without immunodeficiency matched in age. Univariate and multivariate analyses were performed.
    Results: Among the 75 victims of AHT, 5 had at least 1 previous ED visit not linked with abuse. None had visited for infant crying. Among the control subjects, 34 had at least 1 previous ED visit, including 6 for infant crying. Among the 57 dyads of controls and cases living in the hospital's area, the controls had significantly more previous ED visits than the cases (P < 0.001). There were more male infants among the cases (72% vs. 55%, P = 0.033).
    Conclusions: Our study suggests that AHT victims had no more ED visits before visits for child abuse symptoms, particularly not for infant crying.
    MeSH term(s) Case-Control Studies ; Child ; Child Abuse/diagnosis ; Craniocerebral Trauma/diagnosis ; Craniocerebral Trauma/epidemiology ; Emergency Service, Hospital ; Hospitalization ; Humans ; Infant ; Male ; Retrospective Studies
    Language English
    Publishing date 2021-01-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632588-9
    ISSN 1535-1815 ; 0749-5161
    ISSN (online) 1535-1815
    ISSN 0749-5161
    DOI 10.1097/PEC.0000000000002264
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Mortality, cardiac and cerebral damages reduction by IL-1 inhibition in a murine model of TTP.

    Muller, Romain / Cauchois, Raphael / Lagarde, Marie / Roffino, Sandrine / Genovesio, Cecile / Fernandez, Samantha / Hache, Guillaume / Guillet, Benjamin / Kara, Yeter / Marlinge, Marion / Lenting, Peter J / Poullin, Pascale / Dignat-George, Françoise / Tellier, Edwige / Kaplanski, Gilles

    Blood

    2024  

    Abstract: Thrombotic thrombocytopenic purpura (TTP), a rare but fatal disease if untreated, is due to alteration in Von Willebrand factor cleavage resulting in capillary microthrombi formation and ischemic organ damage. Interleukin-1 (IL-1), has been shown to ... ...

    Abstract Thrombotic thrombocytopenic purpura (TTP), a rare but fatal disease if untreated, is due to alteration in Von Willebrand factor cleavage resulting in capillary microthrombi formation and ischemic organ damage. Interleukin-1 (IL-1), has been shown to drive sterile inflammation following ischemia and could play an essential contribution to post-ischemic organ damage in TTP. Our objectives were to evaluate IL-1 involvement during TTP and to test the efficacy of the recombinant IL-1 receptor antagonist, anakinra, in a murine TTP model. We retrospectively measured plasmatic IL-1 concentrations in TTP patients and controls. TTP patients exhibited elevated plasma IL-1α and β concentrations, which correlated with disease course and survival. In a TTP mouse model, we administered anakinra (IL-1 inhibitor) or placebo for 5 days and evaluated the efficacy of this treatment. Anakinra significantly reduced mortality of mice (P<0.001). Anakinra significantly decreased TTP-induced cardiac damages as assessed by blood troponin concentrations, evaluation of left ventricular function by echocardiography, [18F]FDG PET of myocardial glucose metabolism, and cardiac histology. Anakinra also significantly reduced brain TTP-induced damages, evaluated through blood PS100b concentrations, nuclear imaging and histology. We finally showed that IL-1α and β trigger endothelial degranulation in vitro, leading to the release of Von Willebrand factor. In conclusion, Anakinra significantly reduced TTP mortality in a pre-clinical model of the disease by inhibiting both endothelial degranulation and post-ischemic inflammation, supporting further evaluations in humans.
    Language English
    Publishing date 2024-04-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80069-7
    ISSN 1528-0020 ; 0006-4971
    ISSN (online) 1528-0020
    ISSN 0006-4971
    DOI 10.1182/blood.2023021974
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Immune-mediated thrombotic thrombocytopenic purpura plasma induces calcium- and IgG-dependent endothelial activation: correlations with disease severity.

    Tellier, Edwige / Widemann, Agnès / Cauchois, Raphaël / Faccini, Julien / Lagarde, Marie / Brun, Marion / Robert, Philippe / Robert, Stéphane / Bachelier, Richard / Poullin, Pascale / Roose, Elien / Vanhoorelbeke, Karen / Coppo, Paul / Dignat-George, Françoise / Kaplanski, Gilles

    Haematologica

    2023  Volume 108, Issue 4, Page(s) 1127–1140

    Abstract: Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is characterized by a severe ADAMTS13 deficiency due to the presence of anti-ADAMTS13 auto-antibodies, with subsequent accumulation of circulating ultra-large von Willebrand factor (VWF) ... ...

    Abstract Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is characterized by a severe ADAMTS13 deficiency due to the presence of anti-ADAMTS13 auto-antibodies, with subsequent accumulation of circulating ultra-large von Willebrand factor (VWF) multimers. The role of endothelial cell activation as a trigger of the disease has been suggested in animal models but remains to be demonstrated in humans. We prospectively obtained plasma from the first plasma exchange of 25 patients during iTTP acute phase. iTTP but not control plasma, induced a rapid VWF release and P-selectin exposure on the surface of dermal human micro-vascular endothelial cell (HMVEC-d), associated with angiopoietin-2 and endothelin-1 secretion, consistent with Weibel-Palade bodies exocytosis. Calcium (Ca2+) blockade significantly decreased VWF release, whereas iTTP plasma induced a rapid and sustained Ca2+ flux in HMVEC-d which correlated in retrospect, with disease severity and survival in 62 iTTP patients. F(ab)'2 fragments purified from the immunoglobulin G fraction of iTTP plasma mainly induced endothelial cell activation with additional minor roles for circulating free heme and nucleosomes, but not for complement. Furthermore, two anti-ADAMTS13 monoclonal antibodies purified from iTTP patients' B cells, but not serum from hereditary TTP, induced endothelial Ca2+ flux associated with Weibel-Palade bodies exocytosis in vitro, whereas inhibition of endothelial ADAMTS13 expression using small intering RNA, significantly decreased the stimulating effects of iTTP immunoglobulin G. In conclusion, Ca2+-mediated endothelial cell activation constitutes a "second hit" of iTTP, is correlated with the severity of the disease and may constitute a possible therapeutic target.
    MeSH term(s) Animals ; Humans ; Purpura, Thrombotic Thrombocytopenic ; Calcium ; von Willebrand Factor/metabolism ; Immunoglobulin G ; ADAMTS13 Protein ; Patient Acuity
    Chemical Substances Calcium (SY7Q814VUP) ; von Willebrand Factor ; Immunoglobulin G ; ADAMTS13 Protein (EC 3.4.24.87)
    Language English
    Publishing date 2023-04-01
    Publishing country Italy
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2333-4
    ISSN 1592-8721 ; 0017-6567 ; 0390-6078
    ISSN (online) 1592-8721
    ISSN 0017-6567 ; 0390-6078
    DOI 10.3324/haematol.2022.280651
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Clinicians need to decrease antibiotic use in previously healthy infants hospitalised with bronchiolitis.

    Bailhache, Marion / Bloudeau, Emilie / Richer, Olivier / Pillet, Pascal / Lagarde, Marie

    Acta paediatrica (Oslo, Norway : 1992)

    2017  Volume 107, Issue 3, Page(s) 538–539

    MeSH term(s) Anti-Bacterial Agents/administration & dosage ; Bronchiolitis/diagnosis ; Bronchiolitis/drug therapy ; Case-Control Studies ; Cohort Studies ; Drug Utilization/statistics & numerical data ; Female ; France ; Hospitalization/statistics & numerical data ; Hospitals, University ; Humans ; Infant ; Logistic Models ; Male ; Medical Overuse/prevention & control ; Multivariate Analysis ; Retrospective Studies ; Severity of Illness Index
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2017-12-18
    Publishing country Norway
    Document type Journal Article
    ZDB-ID 203487-6
    ISSN 1651-2227 ; 0365-1436 ; 0803-5253
    ISSN (online) 1651-2227
    ISSN 0365-1436 ; 0803-5253
    DOI 10.1111/apa.14168
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Macrophage IL-1β-positive microvesicles exhibit thrombo-inflammatory properties and are detectable in patients with active juvenile idiopathic arthritis.

    Cambon, Audrey / Rebelle, Charlotte / Bachelier, Richard / Arnaud, Laurent / Robert, Stéphane / Lagarde, Marie / Muller, Romain / Tellier, Edwige / Kara, Yéter / Leroyer, Aurélie / Farnarier, Catherine / Vallier, Loris / Chareyre, Corinne / Retornaz, Karine / Jurquet, Anne-Laure / Tran, Tu-Anh / Lacroix, Romaric / Dignat-George, Françoise / Kaplanski, Gilles

    Frontiers in immunology

    2023  Volume 14, Page(s) 1228122

    Abstract: Objective: IL-1β is a leaderless cytokine with poorly known secretory mechanisms that is barely detectable in serum of patients, including those with an IL-1β-mediated disease such as systemic juvenile idiopathic arthritis (sJIA). Leukocyte ... ...

    Abstract Objective: IL-1β is a leaderless cytokine with poorly known secretory mechanisms that is barely detectable in serum of patients, including those with an IL-1β-mediated disease such as systemic juvenile idiopathic arthritis (sJIA). Leukocyte microvesicles (MVs) may be a mechanism of IL-1β secretion. The first objective of our study was to characterize IL-1β-positive MVs obtained from macrophage cell culture supernatants and to investigate their biological functions
    Methods: MVs were purified by serial centrifugations from PBMCs, or THP-1 differentiated into macrophages, then stimulated with LPS ± ATP. MV content was analyzed for the presence of IL-1β, NLRP3 inflammasome, caspase-1, P2X7 receptor, and tissue factor (TF) using ELISA, Western blot, or flow cytometry. MV biological properties were studied
    Results: THP-1-derived macrophages stimulated with LPS and ATP released MVs, which contained NLRP3, caspase-1, and the 33-kDa precursor and 17-kDa mature forms of IL-1β and bioactive TF. IL-1β-positive MVs expressed P2X7 receptor and released soluble IL-1β in response to ATP stimulation
    Conclusion: MVs shed from activated macrophages contain IL-1β, NLRP3 inflammasome components, and TF, and constitute thrombo-inflammatory vectors that can be detected in the plasma from active JIA patients.
    MeSH term(s) Humans ; Animals ; Mice ; NLR Family, Pyrin Domain-Containing 3 Protein/metabolism ; Inflammasomes/metabolism ; Arthritis, Juvenile/metabolism ; Lipopolysaccharides/pharmacology ; Receptors, Purinergic P2X7/metabolism ; Macrophages/metabolism ; Caspase 1/metabolism ; Adenosine Triphosphate/metabolism
    Chemical Substances NLR Family, Pyrin Domain-Containing 3 Protein ; Inflammasomes ; Lipopolysaccharides ; Receptors, Purinergic P2X7 ; Caspase 1 (EC 3.4.22.36) ; Adenosine Triphosphate (8L70Q75FXE)
    Language English
    Publishing date 2023-11-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1228122
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Kinome rewiring during acquired drug resistance in neuroendocrine neoplasms.

    Gérard, Corinne / Lagarde, Marie / Poizat, Flora / Oziel-Taieb, Sandrine / Garcia, Vincent / Roche, Catherine / Niccoli, Patricia / Barlier, Anne / Romano, David

    Endocrine-related cancer

    2020  Volume 28, Issue 1, Page(s) 39–51

    Abstract: Although there is evidence of a significant rise of neuroendocrine neoplasms (NENs) incidence, current treatments are largely insufficient due to somewhat poor knowledge of these tumours. Despite showing differentiated features, NENs exhibit therapeutic ... ...

    Abstract Although there is evidence of a significant rise of neuroendocrine neoplasms (NENs) incidence, current treatments are largely insufficient due to somewhat poor knowledge of these tumours. Despite showing differentiated features, NENs exhibit therapeutic resistance to most common treatments, similar to other cancers in many instances. Molecular mechanisms responsible for this resistance phenomenon are badly understood. We aimed at identifying signalling partners responsible of acquired resistance to treatments in order to develop novel therapeutic strategies. We engineered QGP-1 cells resistant to current leading treatments, the chemotherapeutic agent oxaliplatin and the mTor inhibitor everolimus. Cells were chronically exposed to the drugs and assessed for acquired resistance by viability assay. We used microarray-based kinomics to obtain highthroughput kinase activity profiles from drug sensitive vs resistant cells and identified 'hit' kinases hyperactivated in drug-resistant cells, including kinases from FGFR family, cyclin-dependant kinases and PKCs in oxaliplatin-resistant (R-Ox) QGP-1 cells. We then validated these 'hit' kinases and observed that ERK signalling is specifically enhanced in QGP-1 R-Ox cells. Finally, we assessed drug-resistant cells sensitivity to pharmacological inhibition of 'hit' kinases or their signalling partners. We found that FGFR inhibition markedly decreased ERK signalling and cell viability in QGP-1 R-Ox cells. These results suggest that the FGFR/ERK axis is hyperactivated in response to oxaliplatin-based chemotherapeutic strategy. Thus, this sensitive approach, based on the study of kinome activity, allows identifying potential candidates involved in drug resistance in NENs and may be used to broadly investigate markers of NENs therapeutic response.
    MeSH term(s) Aged ; Antineoplastic Agents/pharmacology ; Antineoplastic Agents/therapeutic use ; Drug Resistance, Neoplasm ; Female ; Humans ; Male ; Middle Aged ; Neuroendocrine Tumors/drug therapy ; Proteomics/methods
    Chemical Substances Antineoplastic Agents
    Language English
    Publishing date 2020-10-29
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1218450-0
    ISSN 1479-6821 ; 1351-0088
    ISSN (online) 1479-6821
    ISSN 1351-0088
    DOI 10.1530/ERC-19-0142
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Delayed hemolytic transfusion reaction in children with sickle cell disease: first 5-year retrospective study in mainland France.

    Falguière, Claire / Allali, Slimane / Khazem, Bassem / Kamdem, Annie / Arnaud, Cécile / Belloy, Marie / Guitton, Corinne / Odièvre, Marie-Hélène / Pertuisel, Sophie / Dumesnil, Cecile / Guillaumat, Cécile / Garrec, Nathalie / Gauthier, Alexandra / Mahe, Perrine / Soussan-Banini, Valerie / Le-Carrer, Laure / Merlin, Etienne / David, Audrey / Pellegrino, Beatrice /
    Paillard, Catherine / Brasme, Jean-Francois / Lagarde, Marie / Pirenne, France / Pondarre, Corinne

    Haematologica

    2023  Volume 108, Issue 3, Page(s) 889–894

    MeSH term(s) Child ; Humans ; Retrospective Studies ; Anemia, Sickle Cell/epidemiology ; Anemia, Sickle Cell/therapy ; Transfusion Reaction/epidemiology ; France/epidemiology ; Hemolysis ; Isoantibodies
    Chemical Substances Isoantibodies
    Language English
    Publishing date 2023-03-01
    Publishing country Italy
    Document type Letter
    ZDB-ID 2333-4
    ISSN 1592-8721 ; 0017-6567 ; 0390-6078
    ISSN (online) 1592-8721
    ISSN 0017-6567 ; 0390-6078
    DOI 10.3324/haematol.2022.281050
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Book ; Thesis: Fractures de l'humerus chez le chien et le chat

    Lagarde, Marie-Annette

    une étude rétrospective de 265 cas

    1993  

    Author's details par Marie-Annette Lagarde
    Language Undetermined
    Size 111 S, Ill
    Document type Book ; Thesis
    Thesis / German Habilitation thesis @Toulouse, Ecole Nat. Vét., Diss. : 1993
    Database Special collection on veterinary medicine and general parasitology

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